I looked at my watch. It was two o’clock.

“You are not tired?” he asked.

“No, but you are?”

“I am suffocating. Excuse me, I will walk up and down and drink some water.”

He went unsteadily through the carriage. I remained alone thinking over what he had said, and I was so engrossed in thought that I did not notice when he reentered by the door at the other end of the carriage.